Cochlear Implants in Forty-Eight Children with Cochlear and/or Vestibular Abnormality

Dettman, Shani; Sadeghi-Barzalighi, Ana; Ambett, Ranjeeta; Dowell, Richard C.; Trotter, M I; Briggs, Robert

doi:10.1159/000320608

Cited by 41 publications

(42 citation statements)

References 59 publications

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“…[16][17][18][19][20] Various methods are reported to prevent facial nerve injury during cochlear implantation in patients with inner-ear anomalies. For cochleostomy, Sennaroglu and Saatci used a combined anteroposterior approach through the ear in which the facial nerve crossed over the oval and round windows.…”

Section: Figmentioning

confidence: 99%

Facial nerve anomalies in paediatric cochlear implant candidates: radiological evaluation

2016

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Background: Pre-operative radiological identification of facial nerve anomalies can help prevent intra-operative facial nerve injury during cochlear implantation. This study aimed to evaluate the incidence and configuration of facial nerve anomalies and their concurrence with inner-ear anomalies in cochlear implant candidates.Methods: Inner-ear and concomitant facial nerve anomalies were evaluated by magnetic resonance imaging and temporal high-resolution computed tomography in 48 children with congenital sensorineural hearing loss who were cochlear implant candidates.Results: Inner-ear anomalies were present in 11 out of 48 patients (23 per cent) and concomitant facial nerve anomalies were present on 7 sides in 4 patients (7 per cent of the total). Facial nerve anomalies were accompanied by cochlear or vestibular malformation.Conclusion: Potential facial nerve abnormalities should always be considered in patients with inner-ear anomalies. Pre-operative facial nerve imaging can increase the surgeon's confidence to plan and perform cochlear implantation. Magnetic resonance imaging should be used to detect inner-ear anomalies; if these are identified, temporal high-resolution computed tomography should be used to evaluate the facial nerve.

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Section: Figmentioning

confidence: 99%

Facial nerve anomalies in paediatric cochlear implant candidates: radiological evaluation

2016

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“…For these reasons, malformation of the cochlea was considered a contra-indication to cochlear implant surgery in the early years of cochlear implantation in children, and it is still not possible to implant some of these children (Bamiou et al, 2001). Despite these difficulties, initial results for small numbers of children with cochlear anomalies have shown that implantation is possible, with some children achieving speech perception and language results similar to those without anatomical abnormalities (Chadha et al, 2009;Dettman et al, 2011). Children with a common cavity anomaly (a single cavity in the cochlea) and other more severe syndromic anomalies have achieved much poorer results (Bauer et al, 2002;Chadha et al, 2009;Lanson et al, 2007;Loundon et al, 2003;Young et al, 1995).…”

Section: Candidacy and Selected Aetiologies/pathologies Of Deafnessmentioning

confidence: 99%

Cochlear Implants in Children: A Review

Sarant¹

2012

Hearing Loss

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“…Many papers have been published on the surgical outcomes of cochlear implantation performed in patients with CVM using these classification systems [Tucci et al, 1995;Luntz et al, 1997;Woolley et al, 1998;Ito et al, 1999;Eisenman et al, 2001;Papsin, 2005;Kim et al, 2006;Dettman et al, 2011;Adunka et al, 2012]. The systems allow the clinician to estimate what might happen during and after cochlear implantation surgery in patients with CVM and to communicate with other clinicians when discussing a patient with CVM.…”

Section: Introductionmentioning

confidence: 99%

“…The systems allow the clinician to estimate what might happen during and after cochlear implantation surgery in patients with CVM and to communicate with other clinicians when discussing a patient with CVM. There have been several comparative studies on postimplantation performance in a large number of CVM subjects and control subjects [Eisenman et al, 2001;Papsin, 2005;Kim et al, 2006;Dettman et al, 2011;Adunka et al, 2012]. Although the data were based on the findings of a few representative malformations such as incomplete partition, common cavity and enlarged vestibular aqueduct [Papsin, 2005;Dettman et al, 2011;Adunka et al, 2012] or were based on the mean value in children grouped arbitrarily, for example by grouping different types of malformation into one group (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…There have been several comparative studies on postimplantation performance in a large number of CVM subjects and control subjects [Eisenman et al, 2001;Papsin, 2005;Kim et al, 2006;Dettman et al, 2011;Adunka et al, 2012]. Although the data were based on the findings of a few representative malformations such as incomplete partition, common cavity and enlarged vestibular aqueduct [Papsin, 2005;Dettman et al, 2011;Adunka et al, 2012] or were based on the mean value in children grouped arbitrarily, for example by grouping different types of malformation into one group (e.g. mild vs. severe malformations) [Eisenman et al, 2001;Kim et al, 2006], the studies commonly demonstrated that severer malformations were associated with poorer speech perception ability after cochlear implantation.…”

Section: Introductionmentioning

confidence: 99%

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A New Classification of Cochleovestibular Malformations and Implications for Predicting Speech Perception Ability after Cochlear Implantation

Jeong

Kim²

2015

Audiol Neurotol

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Objectives: The aims of this study were to introduce a new classification of cochleovestibular malformation (CVM) and to investigate how well this classification can predict speech perception ability after cochlear implantation in children with CVM. Methods: Fifty-nine children with CVM who had used a cochlear implant for more than 3 years were included. CVM was classified into 4 subtypes based on the morphology of the cochlea and the modiolus on temporal bone computed tomography (TBCT): normal cochlea and normal modiolus (type A, n = 16), malformed cochlea and partial modiolus (type B, n = 31), malformed cochlea and no modiolus (type C, n = 6), and no cochlea and no modiolus (type D, n = 6). Speech perception test scores were compared between the subtypes of CVM using analysis of covariance with post hoc Bonferroni test. Univariate and multivariate regression analyses were used to identify the significant predictors of the speech perception test scores. Results: The speech perception test scores after implantation were significantly better in children with CVM type A or type B than in children with CVM type C or type D. The test scores did not differ significantly between the implanted children with CVM type A or type B and those without CVM. In univariate regression analysis, the type of CVM was a significant predictor of the speech perception test scores in implanted children with CVM. Multivariate regression analysis revealed that the age at cochlear implantation, cochlear nerve size and preimplantation speech perception test scores were significant predictors of the postimplantation speech perception test scores. The chance of cochlear nerve deficiency increased progressively from CVM type A to type D. Conclusion: The new classification of CVM based on the morphology of the cochlea and the modiolus is simple and easy to use, and correlated well with postimplantation speech perception ability and cochlear nerve status. This simple classification of CVM using TBCT with cochlear nerve assessment by magnetic resonance imaging is helpful in the preoperative evaluation of children with CVM.

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Cochlear Implants in Forty-Eight Children with Cochlear and/or Vestibular Abnormality

Cited by 41 publications

References 59 publications

Facial nerve anomalies in paediatric cochlear implant candidates: radiological evaluation

Facial nerve anomalies in paediatric cochlear implant candidates: radiological evaluation

Cochlear Implants in Children: A Review

A New Classification of Cochleovestibular Malformations and Implications for Predicting Speech Perception Ability after Cochlear Implantation

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